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Add null config files
author Chris Cannam <cannam@all-day-breakfast.com>
date Mon, 02 Mar 2020 14:03:47 +0000
parents bd3cc4d1df30
children
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cannam@167 3 <!-- This manual is for FFTW
cannam@167 4 (version 3.3.8, 24 May 2018).
cannam@167 5
cannam@167 6 Copyright (C) 2003 Matteo Frigo.
cannam@167 7
cannam@167 8 Copyright (C) 2003 Massachusetts Institute of Technology.
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cannam@167 10 Permission is granted to make and distribute verbatim copies of this
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cannam@167 24 <head>
cannam@167 25 <title>FFTW 3.3.8: Generating your own code</title>
cannam@167 26
cannam@167 27 <meta name="description" content="FFTW 3.3.8: Generating your own code">
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cannam@167 68 </head>
cannam@167 69
cannam@167 70 <body lang="en">
cannam@167 71 <a name="Generating-your-own-code"></a>
cannam@167 72 <div class="header">
cannam@167 73 <p>
cannam@167 74 Previous: <a href="Cycle-Counters.html#Cycle-Counters" accesskey="p" rel="prev">Cycle Counters</a>, Up: <a href="Installation-and-Customization.html#Installation-and-Customization" accesskey="u" rel="up">Installation and Customization</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
cannam@167 75 </div>
cannam@167 76 <hr>
cannam@167 77 <a name="Generating-your-own-code-1"></a>
cannam@167 78 <h3 class="section">10.4 Generating your own code</h3>
cannam@167 79 <a name="index-code-generator-1"></a>
cannam@167 80
cannam@167 81 <p>The directory <code>genfft</code> contains the programs that were used to
cannam@167 82 generate FFTW&rsquo;s &ldquo;codelets,&rdquo; which are hard-coded transforms of small
cannam@167 83 sizes.
cannam@167 84 <a name="index-codelet-2"></a>
cannam@167 85 We do not expect casual users to employ the generator, which is a rather
cannam@167 86 sophisticated program that generates directed acyclic graphs of FFT
cannam@167 87 algorithms and performs algebraic simplifications on them. It was
cannam@167 88 written in Objective Caml, a dialect of ML, which is available at
cannam@167 89 <a href="http://caml.inria.fr/ocaml/index.en.html">http://caml.inria.fr/ocaml/index.en.html</a>.
cannam@167 90 <a name="index-Caml"></a>
cannam@167 91 </p>
cannam@167 92
cannam@167 93 <p>If you have Objective Caml installed (along with recent versions of
cannam@167 94 GNU <code>autoconf</code>, <code>automake</code>, and <code>libtool</code>), then you
cannam@167 95 can change the set of codelets that are generated or play with the
cannam@167 96 generation options. The set of generated codelets is specified by the
cannam@167 97 <code>{dft,rdft}/{codelets,simd}/*/Makefile.am</code> files. For example, you can add
cannam@167 98 efficient REDFT codelets of small sizes by modifying
cannam@167 99 <code>rdft/codelets/r2r/Makefile.am</code>.
cannam@167 100 <a name="index-REDFT-2"></a>
cannam@167 101 After you modify any <code>Makefile.am</code> files, you can type <code>sh
cannam@167 102 bootstrap.sh</code> in the top-level directory followed by <code>make</code> to
cannam@167 103 re-generate the files.
cannam@167 104 </p>
cannam@167 105 <p>We do not provide more details about the code-generation process, since
cannam@167 106 we do not expect that most users will need to generate their own code.
cannam@167 107 However, feel free to contact us at <a href="mailto:fftw@fftw.org">fftw@fftw.org</a> if
cannam@167 108 you are interested in the subject.
cannam@167 109 </p>
cannam@167 110 <a name="index-monadic-programming"></a>
cannam@167 111 <p>You might find it interesting to learn Caml and/or some modern
cannam@167 112 programming techniques that we used in the generator (including monadic
cannam@167 113 programming), especially if you heard the rumor that Java and
cannam@167 114 object-oriented programming are the latest advancement in the field.
cannam@167 115 The internal operation of the codelet generator is described in the
cannam@167 116 paper, &ldquo;A Fast Fourier Transform Compiler,&rdquo; by M. Frigo, which is
cannam@167 117 available from the <a href="http://www.fftw.org">FFTW home page</a> and also
cannam@167 118 appeared in the <cite>Proceedings of the 1999 ACM SIGPLAN Conference on
cannam@167 119 Programming Language Design and Implementation (PLDI)</cite>.
cannam@167 120 </p>
cannam@167 121 <hr>
cannam@167 122 <div class="header">
cannam@167 123 <p>
cannam@167 124 Previous: <a href="Cycle-Counters.html#Cycle-Counters" accesskey="p" rel="prev">Cycle Counters</a>, Up: <a href="Installation-and-Customization.html#Installation-and-Customization" accesskey="u" rel="up">Installation and Customization</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
cannam@167 125 </div>
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cannam@167 127
cannam@167 128
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cannam@167 130 </html>